Еще раз скачал и поставил именно _5.0.1
Error: addon AlchemyHelper: Error while running the chunk
Error: addon AlchemyHelper: [string "Mods/Addons/AlchemyHelper/mainscript.luac"] attempt to call a nil value
Error: addon AlchemyHelper: func: ?, ?, line: -1, defined: C, line: -1, [C]
Error: addon AlchemyHelper: func: ?, ?, line: 1, defined: main, line: 0, [string "Mods/Addons/AlchemyHelper/mainscript.luac"]
Error: addon AlchemyHelper: Can't execute script for addon: Mods/Addons/AlchemyHelper/AddonDesc.(UIAddon).xdb